<template>
	<el-menu
		:default-active="activeMenu"
		mode="horizontal"
		@select="handleSelect"
	>
		<template v-for="(item, index) in topMenus">
			<el-menu-item
				:style="{ '--theme': theme }"
				:index="item.path"
				:key="index"
				v-if="index < visibleNumber"
				><svg-icon :icon-class="item.meta.icon" />
				{{ item.meta.title }}</el-menu-item
			>
		</template>

		<!-- 顶部菜单超出数量折叠 -->
		<el-sub-menu
			:style="{ '--theme': theme }"
			index="more"
			v-if="topMenus.length > visibleNumber"
		>
			<template #title>更多菜单</template>
			<template v-for="(item, index) in topMenus">
				<el-menu-item
					:index="item.path"
					:key="index"
					v-if="index >= visibleNumber"
					><svg-icon :icon-class="item.meta.icon" />
					{{ item.meta.title }}</el-menu-item
				>
			</template>
		</el-sub-menu>
	</el-menu>
</template>

<script setup>
import { ref, computed, onBeforeUnmount, onMounted} from "vue";
import { useRoute, useRouter } from "vue-router";
import { constantRoutes } from "@/router";
import { isHttp } from "@/utils/validate";
import useAppStore from "@/store/modules/app";
import useSettingsStore from "@/store/modules/settings";
import usePermissionStore from "@/store/modules/permission";

// 顶部栏初始数
const visibleNumber = ref(null);
// 当前激活菜单的 index
const currentIndex = ref(null);
// 隐藏侧边栏路由
const hideList = ["/index", "/user/profile"];
const appStore = useAppStore();
const settingsStore = useSettingsStore();
const permissionStore = usePermissionStore();
const route = useRoute();
const router = useRouter();
// 主题颜色
const theme = computed(() => settingsStore.theme);
// 所有的路由信息
const routers = computed(() => permissionStore.topbarRouters);
// 顶部显示菜单
const topMenus = computed(() => {
	let topMenus = [];
	routers.value.map((menu) => {
		if (menu.hidden !== true) {
			// 兼容顶部栏一级菜单内部跳转
			if (menu.path === "/") {
				topMenus.push(menu.children[0]);
			} else {
				topMenus.push(menu);
			}
		}
	});
	return topMenus;
});
// 设置子路由
const childrenMenus = computed(() => {
	let childrenMenus = [];
	routers.value.map((router) => {
		for (let item in router.children) {
			if (router.children[item].parentPath === undefined) {
				if (router.path === "/") {
					router.children[item].path =
						"/" + router.children[item].path;
				} else {
					if (!isHttp(router.children[item].path)) {
						router.children[item].path =
							router.path + "/" + router.children[item].path;
					}
				}
				router.children[item].parentPath = router.path;
			}
			childrenMenus.push(router.children[item]);
		}
	});
	return constantRoutes.concat(childrenMenus);
});
// 默认激活的菜单
const activeMenu = computed(() => {
	const path = route.path;
	let activePath = path;
	if (
		path !== undefined &&
		path.lastIndexOf("/") > 0 &&
		hideList.indexOf(path) === -1
	) {
		const tmpPath = path.substring(1, path.length);
		activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/"));
		appStore.toggleSideBarHide(false);
	} else if (!route.children) {
		activePath = path;
		appStore.toggleSideBarHide(true);
	}
	activeRoutes(activePath);
	return activePath;
});
function setVisibleNumber() {
	const width = document.body.getBoundingClientRect().width / 3;
	visibleNumber.value = parseInt(width / 85);
}
function handleSelect(key, keyPath) {
	currentIndex.value = key;
	const route = routers.value.find((item) => item.path === key);
	if (isHttp(key)) {
		// http(s):// 路径新窗口打开
		window.open(key, "_blank");
	} else if (!route || !route.children) {
		// 没有子路由路径内部打开
		router.push({ path: key });
		appStore.toggleSideBarHide(true);
	} else {
		// 显示左侧联动菜单
		activeRoutes(key);
		appStore.toggleSideBarHide(false);
	}
}
function activeRoutes(key) {
	let routes = [];
	if (childrenMenus.value && childrenMenus.value.length > 0) {
		childrenMenus.value.map((item) => {
			if (key == item.parentPath || (key == "index" && "" == item.path)) {
				routes.push(item);
			}
		});
	}
	if (routes.length > 0) {
		permissionStore.setSidebarRouters(routes);
	}
	return routes;
}
onMounted(() => {
	window.addEventListener("resize", setVisibleNumber);
});
onBeforeUnmount(() => {
	window.removeEventListener("resize", setVisibleNumber);
});
onMounted(() => {
	setVisibleNumber();
});
</script>

<style lang="scss">
.topmenu-container.el-menu--horizontal > .el-menu-item {
	float: left;
	height: 50px !important;
	line-height: 50px !important;
	color: #999093 !important;
	padding: 0 5px !important;
	margin: 0 10px !important;
}
.topmenu-container.el-menu--horizontal > .el-menu-item.is-active,
.el-menu--horizontal > .el-sub-menu.is-active .el-submenu__title {
	border-bottom: 2px solid #{"var(--theme)"} !important;
	color: #303133;
}
/* sub-menu item */
.topmenu-container.el-menu--horizontal > .el-sub-menu .el-sub-menu__title {
	float: left;
	height: 50px !important;
	line-height: 50px !important;
	color: #999093 !important;
	padding: 0 5px !important;
	margin: 0 10px !important;
}
</style>
